We actually have an old fashioned email list. It's a Google Group, because Yahoo Groups shut down.
Email works very well for this. I do wish my neighborhood association would move to a Google group, because right now it’s a massive CC list. Mail hosts tend not to like that very much, and it’s not the most privacy-minded solution. Several other active communities I’m a member of are on mailing lists. The one that switched to a forum platform with email notifications of new threads died fast.
Yeah, cc lists are a nightmare for so many reasons, not least because you can't easily get off/unsubscribe.